In normal shop usage motor brushes will eventually wear out. In professional grade tools like Festool they can be easily and inexpensively replaced. The actual replacement takes five minutes. If you bring the tool to the shop we will replace the brushes for you at no charge (except for cost of the brushes). Replacing the brushes yourself is also not hard to do. We stock most of the replacement brushes you might need for most of the Festool power tool line.